Operating systems is a program that acts as an intermediary between a
user of a computer and the computer hardware (H/W). The purpose of an
operating system is to provide the environment in which the user can execute
programs. The O.S. is a resource allocator (managers all resources, decides
between conflicting requests for efficient and fair resource use) and is a
control program (controls execution of programs ) to prevent errors and
improper use of the computer.
1.2 Computer System Components:

• MySQL introduction
• MySQL Connect Statement
• MySQL Create Database
• MySQL Create a Table
• MySQL Insert Data
• Commit Queries
• Prepared Statements 
• MySQL Select Data
• MySQL Select Data – WHERE & ORDER BY
• MySQL Delete Data
• MySQL Update Data
• MySQL Limit
• .
   

• PHP Superglobals
• PHP Form Handling
• GET vs POST
• PHP Form Validation
   

• Arrays
• Indexed Arrays
• Associative Arrays
• Arrays functions
• PHP Functions
• Arguments
• Strict type arguments
• Reference Arguments

• Introduction
• Hello World! & Basic Examples
• Cool Example
• Variables
• Functions
• Comparisons and logical expressions
• If & if Else Statements
• PHP loops
• include and require
• Stitching PHP and Bootstrap Example